/* 头部区域 */
.header {
    background-color: #fff;
}

.header-nav {
    width: 1200px;
    margin: 0 auto;
    background-color: #fff;
    height: 100px;
    padding-top: 29px;
    position: relative;
}

.header-nav-menu {
    position: absolute;
    top: 29px;
    left: calc(102px + 195px);
    width: 244px;
    height: 35px;

}

.header-nav-menu ul {
    display: flex;
    justify-content: space-between;
}

.header-nav-menu ul li {
    line-height: 35px;
    width: 100%;
    text-align: center;
}

.header-nav-menu ul li a {
    padding: 8px;
}

.header-nav-menu ul li a:hover {
    border-bottom: 1px solid #1AADFF;
}

.header-nav-search {
    position: absolute;
    top: 29px;
    right: calc(116px + 32px);
    width: 412px;
    height: 40px;
}

.header-nav-search input {
    height: 100%;
    width: 100%;
    border-radius: 40px;
    border: none;
    background-color: rgba(0, 0, 0, 0.1);
    padding-left: 20px;
}

.header-nav-search img {
    position: absolute;
    top: 12px;
    right: 12px;
}

.header-nav-user {
    width: 116px;
    height: 30px;
    position: absolute;
    top: 29px;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-nav-user img {
    margin-right: 7px;
}

.banner {
    width: 100%;
    height: 420px;
    background-color: #0092CB;
}

.banner-content {
    width: 1200px;
    margin: 0 auto;
    display: flex;
}

.banner-left-list {
    width: 191px;
    height: 100%;
    padding: 3px 0;
    background-color: #005576;
}

.banner-left-list ul li {
    height: 46px;
    width: 100%;
    line-height: 46px;
    padding-left: 20px;
    position: relative;
}

.banner-left-list ul li a {
    color: #fff;
}

.banner-left-list ul li a:hover {
    color: #00a4ff;
}

.banner-left-list ul li>span {
    display: block;
    width: 10px;
    height: 10px;
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    background-image: url(../images/right.png);
    background-repeat: no-repeat;
    background-size: 100%;
}

.banner-left-list ul li:hover span {
    background-image: url(../images/right-hover.png);
}

.banner-right-courses {
    width: calc(1200px - 191px);
    height: 420px;
    background-image: url(../uploads/banner.png);
    background-repeat: no-repeat;
    background-size: 100%;
    position: relative;
}

.my-course-table {
    position: absolute;
    top: 60px;
    right: 0;
    width: 218px;
    height: 305px;
    background-color: #209DD5;
    border-radius: 10px;
    padding-top: 18px;
}

.my-course-table h2 {
    width: 75px;
    height: 21px;
    line-height: 20px;
    font-size: 15px;
    font-weight: normal;
    color: #fff;
    margin-left: 14px;
    margin-bottom: 9px;
}

.course-content {
    width: 218px;
    height: 257px;
    background-color: #fff;
    border-radius: 10px;
    padding: 14px;
}

.course-content .course-item {
    width: 190px;
    height: 53px;
    border-bottom: 1px solid #EBEBEB;
    text-align: left;
}

.course-content .course-item h2 {
    width: 190px;
    height: 20px;
    font-size: 14px;
    color: #333333;
    margin-left: 0;
    margin-top: 9px;
}

.course-content .learning-content {
    width: 190px;
    height: 17px;
    font-size: 12px;
    line-height: 16px;
    margin-bottom: 9px;
}

.course-content .learning-content span:first-child {
    color: #30B5FF;
}

.course-content .learning-content span:last-child {
    color: #ccc;
}

.course-btn button {
    width: 190px;
    height: 32px;
    background-color: #00a4ff;
    border-radius: 15px;
    border: none;
    margin-top: 14px;
    color: #fff;
}

.main-nav {
    width: 1200px;
    height: 60px;
    background-color: #fff;
    margin: 12px auto 0;
    position: relative;
}

.main-nav span:first-child {
    position: absolute;
    top: 18px;
    left: 20px;
    color: #00a4ff;
}

.main-nav span:last-child {
    position: absolute;
    top: 18px;
    right: 20px;
    color: #00a4ff;
}

.main-nav ul {
    display: flex;
    justify-content: space-between;
    height: 25px;
    width: 911px;
    position: absolute;
    top: 18px;
    left: 112px;
}

.main-nav ul li {
    width: 100px;
    text-align: center;
    line-height: 25px;
    border-right: 1px solid #EBEBEB;
}

.sec1 {
    width: 1200px;
    height: 601px;
    margin: 0 auto;
    margin-top: 31px;
    position: relative;
}

.sec1-rec-header {
    width: 100%;
    height: 30px;
    margin-bottom: 15px;
}

.sec1 .sec1-recommendation .sec1-rec-header h2 {
    width: 84px;
    height: 30px;
    position: absolute;
    top: 0;
    left: 0;
    font-size: 20px;
    color: #333333;
    font-weight: normal;
}

.sec1 .sec1-recommendation .sec1-rec-header span {
    position: absolute;
    top: 0;
    right: 0;
    margin-right: 20px;
    color: #ccc;
}

.sec1 .sec1-recommendation .sec1-rec-header span::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-top: 1px solid #ccc;
    border-right: 1px solid #ccc;
    position: absolute;
    top: 50%;
    right: -15px;
    transform: translateY(-50%) rotate(45deg);
}

.sec1-rec-content {
    width: 100%;
    height: 556px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    flex: 4;

}

.sec1-rec-item {
    width: 228px;
    height: 271px;
    background-color: #fff;
    margin-bottom: 14px;
}

.sec1-rec-item p {
    width: 188px;
    height: 37px;
    margin-top: 20px;
    margin-left: 20px;
    margin-bottom: 16px;
}

.rec-item-details {
    margin-left: 20px;
    color: #ccc;
}

.rec-item-details span:first-child {
    color: #fa6400;
}

.sec2 {
    width: 1200px;
    height: 431px;
    margin: 0 auto;
    margin-top: 18px;
}

.sec2-header {
    width: 100%;
    height: 45px;
    position: relative;
}

.sec2-header h2 {
    position: absolute;
    top: 0;
    left: 0;
    font-size: 20px;
    font-weight: normal;
    width: 147px;
    height: 30px;
}

.sec2-header span {
    position: absolute;
    top: 0;
    right: 0;
    margin-right: 20px;
    color: #ccc;
}

.sec2-header span::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-top: 1px solid #ccc;
    border-right: 1px solid #ccc;
    position: absolute;
    top: 50%;
    right: -15px;
    transform: translateY(-50%) rotate(45deg);
}

.sec2-header ul {
    position: absolute;
    top: 4px;
    left: 446px;
    width: 308px;
    height: 23px;
    line-height: 23px;
    display: flex;
    justify-content: space-between;
}

.sec2-header ul li a:hover,
.sec2-header ul li:first-child a {
    color: #00a4ff;
}

.sec2-content {
    width: 100%;
    height: 386px;
    position: relative;
}

.sec2-content-left {
    width: 228px;
    height: 386px;
    position: absolute;
    top: 0;
    left: 0;
}

.sec2-content-right {
    width: 957px;
    height: 100px;
    position: absolute;
    top: 0;
    right: 0;
}

.content-right-top {
    width: 100%;
    height: 100%;
    margin-bottom: 15px;
}

.content-right-bottom {
    width: 100%;
    height: 271px;
    display: flex;
    justify-content: space-between;
}

.right-bottom-item {
    width: 228px;
    height: 271px;
    background-color: #fff;
}

.right-bottom-item p {
    width: 188px;
    height: 37px;
    margin-top: 20px;
    margin-left: 20px;
    margin-bottom: 16px;
}

.item-details {
    margin-left: 20px;
    color: #ccc;
}

.item-details span:first-child {
    color: #fa6400;
}

.sec3 {
    width: 1200px;
    height: 431px;
    margin: 32px auto 0;
}

.sec3-header {
    width: 100%;
    height: 45px;
    position: relative;
}

.sec3-header h2 {
    position: absolute;
    top: 0;
    left: 0;
    font-size: 20px;
    font-weight: normal;
    width: 185px;
    height: 30px;
}

.sec3-header span {
    position: absolute;
    top: 0;
    right: 0;
    margin-right: 20px;
    color: #ccc;
}

.sec3-header span::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-top: 1px solid #ccc;
    border-right: 1px solid #ccc;
    position: absolute;
    top: 50%;
    right: -15px;
    transform: translateY(-50%) rotate(45deg);
}

.sec3-header ul {
    position: absolute;
    top: 4px;
    left: 446px;
    width: 308px;
    height: 23px;
    line-height: 23px;
    display: flex;
    justify-content: space-between;
}

.sec3-header ul li a:hover,
.sec3-header ul li:first-child a {
    color: #00a4ff;
}

.sec3-content {
    width: 100%;
    height: 386px;
    position: relative;
}

.sec3-content-left {
    width: 228px;
    height: 386px;
    position: absolute;
    top: 0;
    left: 0;
}

.sec3-content-right {
    width: 957px;
    height: 100px;
    position: absolute;
    top: 0;
    right: 0;
}

.content-right-top {
    width: 100%;
    height: 100%;
    margin-bottom: 15px;
}

.content-right-bottom {
    width: 100%;
    height: 271px;
    display: flex;
    justify-content: space-between;
}

.right-bottom-item {
    width: 228px;
    height: 271px;
    background-color: #fff;
}

.right-bottom-item p {
    width: 188px;
    height: 37px;
    margin-top: 20px;
    margin-left: 20px;
    margin-bottom: 16px;
}

.item-details {
    margin-left: 20px;
    color: #ccc;
}

.item-details span:first-child {
    color: #fa6400;
}

.sec4 {
    width: 1200px;
    height: 316px;
    margin: 32px auto 0;
}

.sec4-header {
    width: 100%;
    height: 45px;
    position: relative;
}

.sec4-header h2 {
    position: absolute;
    top: 0;
    left: 0;
    font-size: 20px;
    font-weight: normal;
    width: 185px;
    height: 30px;
}

.sec4-header span {
    position: absolute;
    top: 0;
    right: 0;
    margin-right: 20px;
    color: #ccc;
}

.sec4-header span::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-top: 1px solid #ccc;
    border-right: 1px solid #ccc;
    position: absolute;
    top: 50%;
    right: -15px;
    transform: translateY(-50%) rotate(45deg);
}

.sec4-header ul {
    position: absolute;
    top: 4px;
    left: 446px;
    width: 308px;
    height: 23px;
    line-height: 23px;
    display: flex;
    justify-content: space-between;
}

.sec4-header ul li a:hover,
.sec4-header ul li:nth-child(2) a {
    color: #00a4ff;
}

.sec4-content {
    width: 100%;
    height: 271px;
    display: flex;
    justify-content: space-between;
}

.sec4-content-item {
    background-color: #fff;
}

.sec4-content-item p {
    width: 188px;
    height: 37px;
    margin-top: 20px;
    margin-left: 20px;
    margin-bottom: 16px;
}

.item-details {
    margin-left: 20px;
    color: #ccc;
}

.item-details span:first-child {
    color: #fa6400;
}

.sec5 {
    width: 1200px;
    height: 316px;
    margin: 32px auto 0;
}

.sec5-header {
    width: 100%;
    height: 45px;
    position: relative;
}

.sec5-header h2 {
    position: absolute;
    top: 0;
    left: 0;
    font-size: 20px;
    font-weight: normal;
    width: 185px;
    height: 30px;
}

.sec5-header span {
    position: absolute;
    top: 0;
    right: 0;
    margin-right: 20px;
    color: #ccc;
}

.sec5-header span::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-top: 1px solid #ccc;
    border-right: 1px solid #ccc;
    position: absolute;
    top: 50%;
    right: -12px;
    transform: translateY(-50%) rotate(45deg);

}

.sec5-header ul {
    position: absolute;
    top: 4px;
    left: 446px;
    width: 308px;
    height: 23px;
    line-height: 23px;
    display: flex;
    justify-content: space-between;
}

.sec5-header ul li a:hover,
.sec5-header ul li:first-child a {
    color: #00a4ff;
}

.sec5-content {
    width: 100%;
    height: 271px;
    display: flex;
    justify-content: space-between;
}

.sec5-content-item {
    background-color: #fff;
}

.sec5-content-item p {
    width: 188px;
    height: 37px;
    margin-top: 20px;
    margin-left: 20px;
    margin-bottom: 16px;
}

.item-details {
    margin-left: 20px;
    color: #ccc;
}

.item-details span:first-child {
    color: #fa6400;
}

.footer {
    width: 100%;
    height: 273px;
    margin-top: 60px;
    background-color: #fff;
}

.footer-content {
    width: 1200px;
    height: 100%;
    margin: 0 auto;
    padding-top: 60px;
    display: flex;
    justify-content: space-between;
}

.footer-content-left {
    width: 432px;
    height: 147px;
}

.footer-content-left img {
    margin-bottom: 24px;
}

.footer-content-left p {
    font-size: 12px;
}

.footer-content-left input {
    width: 120px;
    height: 36px;
    background-color: #ffffff;
    border: solid 1px #00a4ff;
    margin-top: 14px;
    color: #00a4ff;
}

.footer-content-right {
    width: 516px;
    height: 151px;
    display: flex;
    justify-content: space-between;
}

.footer-content-right dl {
    width: 150px;
    height: 147px;
}

.footer-content-right dl dt {
    font-size: 16px;
    font-weight: normal;
    margin-bottom: 14px;
}

.footer-content-right dl dd {
    font-size: 14px;

}

.footer-content-right dl dd a {
    color: #ccc;
}